686236536 has 40 divisors (see below), whose sum is σ = 1922099520. Its totient is φ = 228745296.

The previous prime is 686236489. The next prime is 686236549. The reversal of 686236536 is 635632686.

686236536 is a `hidden beast` number, since 6 + 86 + 2 + 36 + 536 = 666.

686236536 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 686236491 and 686236500.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 528856 + ... + 530151.

It is an arithmetic number, because the mean of its divisors is an integer number (48052488).

Almost surely, 2^686236536 is an apocalyptic number.

It is an amenable number.

686236536 is an abundant number, since it is smaller than the sum of its proper divisors (1235862984).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

686236536 is a wasteful number, since it uses less digits than its factorization.

686236536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1059025 (or 1059012 counting only the distinct ones).

The product of its digits is 933120, while the sum is 45.

The square root of 686236536 is about 26196.1168114665. The cubic root of 686236536 is about 882.0460894977.

The spelling of 686236536 in words is "six hundred eighty-six million, two hundred thirty-six thousand, five hundred thirty-six".